Most requests arrive with a few vague words in them: “soon”, “the deck”, “tidy it up”. The person asking knows exactly what they mean, and you hear a different version that sounds just as clear. One sentence back, with a number in it, catches the difference before you've spent two days on the wrong thing.
Easy to start
Medium impact
Learn it: 1 week
One sentence back
one request, read two ways
Three vague phrases, two readings each. One sentence back caught all three before Sam spent two days on a redesign nobody asked for.
The habit
Try it now.
Spot the vague words
Listen for three kinds: what (“the deck”), when (“soon”, “before Friday”) and how good (“tidy up”, “nothing fancy”).
Say it back, with a number in it
In your own words, not theirs: “slides 1–12 by Thursday noon”. Repeating their words back checks nothing.
Ask what done looks like
One question, and let them answer it. “Done means I could send it as is” tells you how far to go.
Write it in one line and send it
What, by when, and what done means. If you've got it wrong, they'll say so in a minute rather than on Friday.
Check in halfway
Show something small, early: “here are slides 1–6”. A wrong turn costs an hour now, not the whole job.
If they change their mind at the check-in, that's the say-back working, not failing.
When to break the rule: with someone you've done the same task with ten times, a say-back is noise; skip it. And when something's on fire, act first and clarify after.
Mark a real request
Find the vague words, then write the sentence back.
Paste a request you've been given. The words that could mean two things are marked: what, when and how good. Then fill in your reading of each, and you have the sentence to send back.
The request, marked
what
when
how good
Say it back
Nothing you type is saved or sent anywhere. The word list is a rough guide: a phrase it misses can still be vague, and one it marks may be clear between the two of you.
The study behind it
Speakers think they were understood more often than they were.
Boaz Keysar and Anne Henly gave speakers sentences with two meanings, like “Angela shot the man with the gun”, and told each speaker which meaning to get across. The speaker said it to a listener, the listener picked a reading, and the speaker guessed whether they'd been understood.
Speakers thought they'd got their meaning across more often than they had. They knew the sentences were ambiguous and still did it: they could hear their meaning in their own voice. Overhearers, who were told the intended meaning and listened in, didn't overestimate the same way.
It's a lab study of single sentences, not a week of work requests. But the direction is the useful part: you can't tell from the inside whether you were clear, and neither can the person who asked you. A say-back is how both of you find out.
The design and the direction of the result, no figures. Keysar & Henly, “Speakers' overestimation of their effectiveness”, Psychological Science, 2002.
The idea
Why it works.
The person asking fills the gaps in their own request without noticing: they know which deck, and “before Friday” means Thursday to them because they need a day to read it. You fill the same gaps with your own guesses, and both versions feel obvious.
A say-back puts your version out loud where they can hear it. Numbers do most of the work, because “slides 1–12” and “Thursday noon” can be wrong in a way “the deck” and “soon” never can.
When it goes wrong
Habits that help.
Use your words, not theirs. “So you'd like me to tidy up the deck?” checks nothing.
One sentence, not a quiz. Five questions feel like pushback; one say-back feels like care.
Do it when you ask, too. “To check I was clear: what will you send me, and when?”
Write it where they'll see it. A one-line message is easier to correct than a memory.
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